package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;

import com.sky.service.ShoppingCartService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Slf4j
@Service
public class ShoppingCartServiceImpl implements ShoppingCartService {

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private SetmealMapper setmealMapper;
    /**
     * @Description : 向购物车中添加商品
     *  * @param shoppingCartDTO
     * @Return : com.sky.result.Result
     */
    @Override
    public void add(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart= new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);
        Long userId = BaseContext.getCurrentId();
        log.info("Userid: " + userId);
        shoppingCart.setUserId(userId);
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        if(list.size()>0 && list!=null) {
            ShoppingCart cart = list.get(0);
            cart.setNumber(cart.getNumber()+1);
            shoppingCartMapper.updateNumberById(cart);
        }else {
            Long dishId=shoppingCartDTO.getDishId();
            if (dishId!=null){
                Dish dish = dishMapper.getById(dishId);
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setName(dish.getName());
                shoppingCart.setAmount(dish.getPrice());
            }else {
                Long setmealId = shoppingCartDTO.getSetmealId();
                Setmeal setmeal = setmealMapper.getById(setmealId);
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setAmount(setmeal.getPrice());
            }
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartMapper.insert(shoppingCart);
        }

    }
    /**
     * @Description : 显示购物车列表
     *  * @param id
     * @Return : com.sky.result.Result
     */
    @Override
    public List<ShoppingCart> showShoppingCart(Long id) {
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = ShoppingCart.builder()
                        .userId(userId)
                        .build();
        return shoppingCartMapper.list(shoppingCart);
    }

    /**
     * @Description : 清空购物车
     *  * @param
     * @Return : com.sky.result.Result
     */
    @Override
    public void cleanShoppingCart() {
        Long userId = BaseContext.getCurrentId();
        shoppingCartMapper.deleteByUserId(userId);
    }

    /**
     * @Description : 减少购物车中商品数量
     *  * @param
     * @Return : com.sky.result.Result
     */
    @Override
    public void subNumber(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        shoppingCart.setUserId(BaseContext.getCurrentId());
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);

        if(list.size()>=0&&list!=null){
            shoppingCart = list.get(0);
            Integer number = shoppingCart.getNumber();
            if(number == 1){
                shoppingCartMapper.deleteById(shoppingCart.getId());
            }else{
                shoppingCart.setNumber(shoppingCart.getNumber()-1);
                shoppingCartMapper.updateNumberById(shoppingCart);
            }

        }
    }
}
